—It’s too difficult for me ___the task in such a short time.—Cheer up,I am sure you can.
The TV programme on this channel was so ____that everyone there felt___.
Don’t ___________ before the bus stops.
Teenagers like to photos of famous stars in their bedrooms.
---Would you like to climb the hill with us tomorrow? --- If it , I .
When he walks_______ my desk,he knocked my books________ the floor.